Author Topic: JAXA - Akatsuki - Venus Climate Orbiter (PLANET-C) (Read 303134 times)

Fuji · « **Reply #180 on:** 06/26/2013 02:58 am »

Quote from: Robotbeat on 06/06/2013 09:56 pm

Additionally, have any more IKAROS contact attempts been made yet? It's almost early summer...

IKAROS contact was successfully accomplished on Jun 20th.
She is back again

Fuji · « **Reply #181 on:** 06/03/2014 02:57 pm »

Again communication with IKAROS has established May 22 th.

http://www.isas.jaxa.jp/j/topics/topics/2014/0526.shtml (Japanese report)

yoichi · « **Reply #182 on:** 06/04/2014 03:19 pm »

http://global.jaxa.jp/projects/sat/ikaros/topics.html

Jun. 4, 2014 Updated
IKAROS wakes up from hibernation mode for third time

The IKAROS seemed to wake up from its hibernation mode in mid April, and JAXA searched for it based on its attitude and orbit prediction to receive its radio waves. On May 22 (Thu.), we successfully found the IKAROS, which is flying at a distance of about 230 million kilometers from the Earth. We will continue to receive data from the IKAROS until mid June to confirm its condition and analyze the information.

The IKAROS, launched in May 2010, completed its mission, and is now revolving around the sun about every 10 months. Power generation is insufficient for seven months out of 10 so the IKAROS goes into hibernation mode for this period by shutting down instruments. For the remaining three months, the IKAROS is awake with enough power so that we can receivedata from it.

Galactic Penguin SST · « **Reply #183 on:** 11/25/2014 01:18 pm »

Quote from: plutogno on 06/08/2013 09:59 am

Akatsuki mission update (Nov 2012)
http://www.lpi.usra.edu/vexag/meetings/archive/vexag_10th/Nov2012/presentations/12_Akatsuki_Imamura.pdf

Is this still the plan right now? If so Venus orbit insertion is roughly a year away..... (Nov. 22, 2015 according to this paper)

plutogno · « **Reply #184 on:** 11/25/2014 04:49 pm »

as far as I know, it's still the plan

Fuji · « **Reply #185 on:** 11/26/2014 11:47 am »

Quote from: Galactic Penguin SST on 11/25/2014 01:18 pm

Quote from: plutogno on 06/08/2013 09:59 am
Akatsuki mission update (Nov 2012)
http://www.lpi.usra.edu/vexag/meetings/archive/vexag_10th/Nov2012/presentations/12_Akatsuki_Imamura.pdf

Is this still the plan right now? If so Venus orbit insertion is roughly a year away..... (Nov. 22, 2015 according to this paper)

Yes, Nov. 2015 is the official plan.
Four RCS thruster wiil be burned 20 minutes continuously.

plutogno · « **Reply #186 on:** 12/05/2014 01:24 pm »

this paper was one of the most recent updates on Akatsuki I have seen
http://www.issfd.org/ISSFD_2012/ISSFD23_FDOP1_5.pdf
it dates from 2 years ago. but tweets on Akatsuki_JAXA show it to be still healthy

plutogno · « **Reply #187 on:** 12/18/2014 08:27 pm »

an update (in Japanese only at the time) on Akatsuki's observations during solar conjunction
http://www.jaxa.jp/press/2014/12/20141218_akatsuki_j.html

yoichi · « **Reply #188 on:** 12/25/2014 01:54 pm »

Quote from: plutogno on 12/18/2014 08:27 pm

an update (in Japanese only at the time) on Akatsuki's observations during solar conjunction
http://www.jaxa.jp/press/2014/12/20141218_akatsuki_j.html

http://global.jaxa.jp/press/2014/12/20141218_akatsuki.html
How is Solar Wind Caused?
Venus Climate Orbiter "AKATSUKI" Elucidated Solar Wind Acceleration

Fuji · « **Reply #189 on:** 12/26/2014 10:28 am »

Quote from: Fuji on 11/26/2014 11:47 am

Yes, Nov. 2015 is the official plan.
Four RCS thruster wiil be burned 20 minutes continuously.

Plan is changing now.
Nov. 22, 2015 plan is cancelled. It turned out this orbit is decayed too early.
New plan is waiting for manager's approval.

Fuji · « **Reply #190 on:** 01/06/2015 10:36 am »

New Plan is determined early December, 2015.
Height of apogee is changed from planned 80,000km to 300,000 or 400,000km.

http://www.yomiuri.co.jp/science/20150105-OYT1T50070.html (Japanese)

Galactic Penguin SST · « **Reply #191 on:** 01/27/2015 08:11 am »

Quote from: Fuji on 01/06/2015 10:36 am

New Plan is determined early December, 2015.
Height of apogee is changed from planned 80,000km to 300,000 or 400,000km.

http://www.yomiuri.co.jp/science/20150105-OYT1T50070.html (Japanese)

The next VOI attempt (and the last chance IIRC) will be on December 7: http://www3.nhk.or.jp/news/html/20150127/k10015007881000.html

blister · « **Reply #192 on:** 02/06/2015 04:32 am »

Now has been current press conference about the Akatsuki is opened. Press release also came out. (Japanese)

http://www.isas.jaxa.jp/j/topics/topics/2015/0206_akatsuki.shtml
http://blog.nvs-live.com/?eid=270
https://twitter.com/sorae_jp/

Galactic Penguin SST · « **Reply #193 on:** 02/06/2015 05:08 am »

Quote from: blister on 02/06/2015 04:32 am

Now has been current press conference about the Akatsuki is opened. Press release also came out. (Japanese)

http://www.isas.jaxa.jp/j/topics/topics/2015/0206_akatsuki.shtml
http://blog.nvs-live.com/?eid=270
https://twitter.com/sorae_jp/

What he is trying to say is that JAXA has just did a press conference about VOI and initial science operations on PLANET-C. And luckily they have made a press release in English:

Venus Climate Orbiter “AKATSUKI”
Re-injection to Venus Orbit and Observation Plan

February 6, 2015 (JST)
Japan Aerospace Exploration Agency (JAXA)

The Japan Aerospace Exploration Agency has decided the schedule for the Venus Climate Orbiter “AKATSUKI” to be injected into the Venus orbit in the winter of 2015, as well as its observation plan.
After failing to be inserted into the Venus orbit in December 2010, JAXA has been carefully studying another attempt opportunity for the injection when the orbiter meets Venus in the winter of 2015.

After being injected into the orbit, the AKATSUKI will observe the atmosphere of Venus, which is often referred to as a twin sister of the Earth, through remote sensing. Its observations are expected to develop “Planetary Meteorology” further by elucidating the atmospheric circulation mechanism and studying the comparison with the Earth.

1. Injection schedule to Venus orbit

Planned date: Dec. 7 (Mon.), 2015 (Japan Standard Time)

2. Observation plan

The observation plan of the AKATSUKI is to measures the following with a multiple number of wave lengths from an elliptical orbit around Venus whose period is eight to nine days.

When flying further away from Venus, or about 10 times the radius of Venus from the planet, the AKATSUKI will continuously observe Venus as a whole to understand its clouds, deep atmosphere, and surface conditions.

When flying closer to Venus, or less than 10 times the radius of Venus, the orbiter will conduct close-up observations to clarify cloud convection, the distribution of minute undulatory motions and their changes.
When the AKATSUKI comes closest to Venus, it will observe the layer structure of clouds and the atmosphere from a lateral direction.

When the orbiter is in the shade of the sun, it will monitor lightning and airglow (night glow.)
The AKATSUKI will also observe to capture the atmospheric layer structure and its changes by emitting radio waves that penetrates the atmosphere of Venus and receiving them on the ground.

Fuji · « **Reply #194 on:** 02/06/2015 01:25 pm »

Press briefing material is here (Japanese).
http://www.isas.jaxa.jp/j/topics/topics/2015/image/0206_akatsuki/akatsuki.pdf

kato · « **Reply #195 on:** 02/08/2015 05:39 pm »

If I understand the schedule on page 17 right:

- red column is orbit injection in December 2015
- blue column is commissioning phase in orbit? followed by orbit correction in Spring 2016
- the numbers given in Green are the apoapsis? (500,000 km initial, 320,000 km after correction, 310,000 km after some degradation?)
- operations in Venus orbit until spring 2018

yoichi · « **Reply #196 on:** 05/02/2015 08:45 am »

http://global.jaxa.jp/projects/sat/ikaros/topics.html#topics4577

Apr. 30, 2015 Updated
IKAROS wakes up from hibernation mode for the 4th time

The IKAROS seemed to wake up from its hibernation mode in mid March 2015, and JAXA searched for it based on its attitude and orbit prediction to receive its radio waves. On April 23 (Thu.), we successfully found the IKAROS, which is flying at a distance of about 120 million kilometers from the Earth.
We will continue to receive data from the IKAROS until May to confirm its condition and analyze the information.

The IKAROS, launched in May 2010, completed its mission, and is now revolving around the sun about every 10 months. Power generation is insufficient for seven months out of 10 so the IKAROS goes into hibernation mode for this period by shutting down instruments. For the remaining three months, the IKAROS is awake with enough power so that we can receivedata from it.

plutogno · « **Reply #197 on:** 07/10/2015 07:14 am »

Akatsuki to perform a three-part course correction from July 17
http://global.jaxa.jp/projects/sat/planet_c/topics.html?utm_source=dlvr.it&utm_medium=twitter#topics5055

plutogno · « **Reply #198 on:** 08/05/2015 05:33 am »

course correction was apparently successful
http://www.isas.jaxa.jp/j/topics/topics/2015/0805.shtml

catdlr · « **Reply #199 on:** 08/05/2015 09:37 am »

July 2015 Venus Climate Orbiter "Akatsuki" course correction operation

Published on Aug 4, 2015
Orbit correction operation of the Venus Climate Orbiter "Akatsuki" was carried out in July 31, 2015.
The course correction was able to perform as planned.
It will be re-introduced into the Venus in December 7, 2015.